function scroll() {
     var title = document.title; 
	 if(title == "" || title == null){
		title = "　Welcome　to　Shanxi　Lanke　Biotech　Co.,Ltd.^^";
	 }
     var firstch = title.charAt(0);//取第一个字符
	 if(firstch == "" || firstch == " " || firstch == undefined || firstch == "undefined"){
		 var leftstr = title.substring(1, title.length); //取第二个到最后这段字符；
	 	 document.title = leftstr +" "+ firstch;
	 }else{
		 var leftstr = title.substring(1, title.length); //取第二个到最后这段字符；
		 document.title = leftstr + firstch;	 
	 }
     
     
}
     setInterval("scroll()",500);